Anvil! The Story of Anvil became a surprising sleeper hit, thanks in large part to word of mouth (aka Twitter). The documentary centers around Canadian heavy metal band Anvil, who may have been little known to the public, but actually went on to influence other popular acts like Metallica. Metallica even shows up in the movie to talk about the band.

The movie was beloved by critics (check that Rotten Tomatoes rating!) and was nominated for an Independent Spirit Award.